18580056169 has 2 divisors, whose sum is σ = 18580056170. Its totient is φ = 18580056168.

The previous prime is 18580056163. The next prime is 18580056241. The reversal of 18580056169 is 96165008581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13013105625 + 5566950544 = 114075^2 + 74612^2 .

It is a cyclic number.

It is not a de Polignac number, because 18580056169 - 2³ = 18580056161 is a prime.

It is a super-2 number, since 2×18580056169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18580056161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9290028084 + 9290028085.

It is an arithmetic number, because the mean of its divisors is an integer number (9290028085).

Almost surely, 2^18580056169 is an apocalyptic number.

It is an amenable number.

18580056169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18580056169 is an equidigital number, since it uses as much as digits as its factorization.

18580056169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 49.

The spelling of 18580056169 in words is "eighteen billion, five hundred eighty million, fifty-six thousand, one hundred sixty-nine".